Docker Buildx missing files in building arm 64 rails image - ruby-on-rails

Question

I am trying to build a arm64 image on a x64 linux os. The 64 bit version using docker build . ... works perfectly. On the docker buildx version though, I am missing several configuration files causing the deploy to fail.
The app is a rails app with webpacker. The missing files I've found so far are config/webpacker.yml and config/webpack/, and app/javascript/*.
Dockerfile:
FROM ruby:3.0.3-slim-bullseye
RUN apt-get update -qq &&\
apt install curl -y
RUN curl -fsSL https://deb.nodesource.com/setup_16.x | bash - &&\
curl -sS https://dl.yarnpkg.com/debian/pubkey.gpg | apt-key add - &&\
echo "deb https://dl.yarnpkg.com/debian/ stable main" | tee /etc/apt/sources.list.d/yarn.list &&\
apt-get update -qq &&\
apt-get install -y nodejs yarn \
build-essential \
libpq-dev libsqlite3-dev
RUN useradd --user-group --create-home --shell /bin/false app
ENV HOME=/home/app
USER app
WORKDIR $HOME/wedding
COPY --chown=app:app Gemfile ./
RUN bundle config set --local path 'vendor/bundle' &&\
bundle install
COPY --chown=app:app package.json yarn.lock ./
RUN yarn install
COPY --chown=app:app . .
RUN bundle exec rake webpacker:compile
# i even tried copying the file manually to no success
COPY --chown=app:app ./config/webpacker.yml ./config/
EXPOSE 3000
CMD ["bundle", "exec", "rails", "server", "-b", "0.0.0.0"]
Docker build command:
docker buildx build --platform linux/arm64 -t my.registry.com/wedding --load .
Gemfile:
source "https://rubygems.org"
git_source(:github) { |repo| "https://github.com/#{repo}.git" }
ruby "3.0.3"
# Bundle edge Rails instead: gem "rails", github: "rails/rails", branch: "main"
gem "rails", "~> 7.0.1"
# Use sqlite3 as the database for Active Record
gem "sqlite3", "~> 1.4"
# Use the Puma web server [https://github.com/puma/puma]
gem "puma", "~> 5.0"
# Use JavaScript with ESM import maps [https://github.com/rails/importmap-rails]
gem "importmap-rails"
# Hotwire's SPA-like page accelerator [https://turbo.hotwired.dev]
gem "turbo-rails"
# Hotwire's modest JavaScript framework [https://stimulus.hotwired.dev]
gem "stimulus-rails"
# The original asset pipeline for Rails [https://github.com/rails/sprockets-rails]
gem "sprockets-rails"
# Build JSON APIs with ease [https://github.com/rails/jbuilder]
# gem "jbuilder"
# gem 'activeadmin'
# gem 'devise'
# gem "auto_strip_attributes"
# gem "scenic"
# gem 'scenic_sqlite_adapter'
# gem 'webpacker'
# gem "sprockets"
# Use Redis adapter to run Action Cable in production
# gem "redis", "~> 4.0"
# Use Kredis to get higher-level data types in Redis [https://github.com/rails/kredis]
# gem "kredis"
# Use Active Model has_secure_password [https://guides.rubyonrails.org/active_model_basics.html#securepassword]
# gem "bcrypt", "~> 3.1.7"
# Windows does not include zoneinfo files, so bundle the tzinfo-data gem
gem "tzinfo-data", platforms: %i[ mingw mswin x64_mingw jruby ruby ]
# Reduces boot times through caching; required in config/boot.rb
gem "bootsnap", require: false
# Use Sass to process CSS
# gem "sassc-rails"
# Use Active Storage variants [https://guides.rubyonrails.org/active_storage_overview.html#transforming-images]
# gem "image_processing", "~> 1.2"
group :development, :test do
# See https://guides.rubyonrails.org/debugging_rails_applications.html#debugging-with-the-debug-gem
gem "debug", platforms: %i[ mri mingw x64_mingw ]
end
group :development do
# Use console on exceptions pages [https://github.com/rails/web-console]
gem "web-console"
# Add speed badges [https://github.com/MiniProfiler/rack-mini-profiler]
# gem "rack-mini-profiler"
# Speed up commands on slow machines / big apps [https://github.com/rails/spring]
# gem "spring"
end
group :test do
# Use system testing [https://guides.rubyonrails.org/testing.html#system-testing]
gem "capybara"
gem "selenium-webdriver"
gem "webdrivers"
end
gem "activeadmin", "~> 2.11"
gem "devise", "~> 4.8"
gem "auto_strip_attributes", "~> 2.6"
gem "scenic", "~> 1.6"
gem "scenic_sqlite_adapter", "~> 0.1.0"
gem "webpacker", "~> 5.4"
Gemfile lock:
GEM
remote: https://rubygems.org/
specs:
actioncable (7.0.2.3)
actionpack (= 7.0.2.3)
activesupport (= 7.0.2.3)
nio4r (~> 2.0)
websocket-driver (>= 0.6.1)
actionmailbox (7.0.2.3)
actionpack (= 7.0.2.3)
activejob (= 7.0.2.3)
activerecord (= 7.0.2.3)
activestorage (= 7.0.2.3)
activesupport (= 7.0.2.3)
mail (>= 2.7.1)
net-imap
net-pop
net-smtp
actionmailer (7.0.2.3)
actionpack (= 7.0.2.3)
actionview (= 7.0.2.3)
activejob (= 7.0.2.3)
activesupport (= 7.0.2.3)
mail (~> 2.5, >= 2.5.4)
net-imap
net-pop
net-smtp
rails-dom-testing (~> 2.0)
actionpack (7.0.2.3)
actionview (= 7.0.2.3)
activesupport (= 7.0.2.3)
rack (~> 2.0, >= 2.2.0)
rack-test (>= 0.6.3)
rails-dom-testing (~> 2.0)
rails-html-sanitizer (~> 1.0, >= 1.2.0)
actiontext (7.0.2.3)
actionpack (= 7.0.2.3)
activerecord (= 7.0.2.3)
activestorage (= 7.0.2.3)
activesupport (= 7.0.2.3)
globalid (>= 0.6.0)
nokogiri (>= 1.8.5)
actionview (7.0.2.3)
activesupport (= 7.0.2.3)
builder (~> 3.1)
erubi (~> 1.4)
rails-dom-testing (~> 2.0)
rails-html-sanitizer (~> 1.1, >= 1.2.0)
activeadmin (2.11.1)
arbre (~> 1.2, >= 1.2.1)
formtastic (>= 3.1, < 5.0)
formtastic_i18n (~> 0.4)
inherited_resources (~> 1.7)
jquery-rails (~> 4.2)
kaminari (~> 1.0, >= 1.2.1)
railties (>= 6.0, < 7.1)
ransack (~> 2.1, >= 2.1.1)
activejob (7.0.2.3)
activesupport (= 7.0.2.3)
globalid (>= 0.3.6)
activemodel (7.0.2.3)
activesupport (= 7.0.2.3)
activerecord (7.0.2.3)
activemodel (= 7.0.2.3)
activesupport (= 7.0.2.3)
activestorage (7.0.2.3)
actionpack (= 7.0.2.3)
activejob (= 7.0.2.3)
activerecord (= 7.0.2.3)
activesupport (= 7.0.2.3)
marcel (~> 1.0)
mini_mime (>= 1.1.0)
activesupport (7.0.2.3)
concurrent-ruby (~> 1.0, >= 1.0.2)
i18n (>= 1.6, < 2)
minitest (>= 5.1)
tzinfo (~> 2.0)
addressable (2.8.0)
public_suffix (>= 2.0.2, < 5.0)
arbre (1.5.0)
activesupport (>= 3.0.0, < 7.1)
ruby2_keywords (>= 0.0.2, < 1.0)
auto_strip_attributes (2.6.0)
activerecord (>= 4.0)
bcrypt (3.1.17)
bindex (0.8.1)
bootsnap (1.11.1)
msgpack (~> 1.2)
builder (3.2.4)
capybara (3.36.0)
addressable
matrix
mini_mime (>= 0.1.3)
nokogiri (~> 1.8)
rack (>= 1.6.0)
rack-test (>= 0.6.3)
regexp_parser (>= 1.5, < 3.0)
xpath (~> 3.2)
childprocess (4.1.0)
concurrent-ruby (1.1.10)
crass (1.0.6)
debug (1.4.0)
irb (>= 1.3.6)
reline (>= 0.2.7)
devise (4.8.1)
bcrypt (~> 3.0)
orm_adapter (~> 0.1)
railties (>= 4.1.0)
responders
warden (~> 1.2.3)
digest (3.1.0)
erubi (1.10.0)
formtastic (4.0.0)
actionpack (>= 5.2.0)
formtastic_i18n (0.7.0)
globalid (1.0.0)
activesupport (>= 5.0)
has_scope (0.8.0)
actionpack (>= 5.2)
activesupport (>= 5.2)
i18n (1.10.0)
concurrent-ruby (~> 1.0)
importmap-rails (1.0.3)
actionpack (>= 6.0.0)
railties (>= 6.0.0)
inherited_resources (1.13.1)
actionpack (>= 5.2, < 7.1)
has_scope (~> 0.6)
railties (>= 5.2, < 7.1)
responders (>= 2, < 4)
io-console (0.5.11)
io-wait (0.2.1)
irb (1.4.1)
reline (>= 0.3.0)
jquery-rails (4.4.0)
rails-dom-testing (>= 1, < 3)
railties (>= 4.2.0)
thor (>= 0.14, < 2.0)
kaminari (1.2.2)
activesupport (>= 4.1.0)
kaminari-actionview (= 1.2.2)
kaminari-activerecord (= 1.2.2)
kaminari-core (= 1.2.2)
kaminari-actionview (1.2.2)
actionview
kaminari-core (= 1.2.2)
kaminari-activerecord (1.2.2)
activerecord
kaminari-core (= 1.2.2)
kaminari-core (1.2.2)
loofah (2.15.0)
crass (~> 1.0.2)
nokogiri (>= 1.5.9)
mail (2.7.1)
mini_mime (>= 0.1.1)
marcel (1.0.2)
matrix (0.4.2)
method_source (1.0.0)
mini_mime (1.1.2)
minitest (5.15.0)
msgpack (1.4.5)
net-imap (0.2.3)
digest
net-protocol
strscan
net-pop (0.1.1)
digest
net-protocol
timeout
net-protocol (0.1.2)
io-wait
timeout
net-smtp (0.3.1)
digest
net-protocol
timeout
nio4r (2.5.8)
nokogiri (1.13.3-aarch64-linux)
racc (~> 1.4)
nokogiri (1.13.3-x86_64-linux)
racc (~> 1.4)
orm_adapter (0.5.0)
public_suffix (4.0.6)
puma (5.6.2)
nio4r (~> 2.0)
racc (1.6.0)
rack (2.2.3)
rack-proxy (0.7.2)
rack
rack-test (1.1.0)
rack (>= 1.0, < 3)
rails (7.0.2.3)
actioncable (= 7.0.2.3)
actionmailbox (= 7.0.2.3)
actionmailer (= 7.0.2.3)
actionpack (= 7.0.2.3)
actiontext (= 7.0.2.3)
actionview (= 7.0.2.3)
activejob (= 7.0.2.3)
activemodel (= 7.0.2.3)
activerecord (= 7.0.2.3)
activestorage (= 7.0.2.3)
activesupport (= 7.0.2.3)
bundler (>= 1.15.0)
railties (= 7.0.2.3)
rails-dom-testing (2.0.3)
activesupport (>= 4.2.0)
nokogiri (>= 1.6)
rails-html-sanitizer (1.4.2)
loofah (~> 2.3)
railties (7.0.2.3)
actionpack (= 7.0.2.3)
activesupport (= 7.0.2.3)
method_source
rake (>= 12.2)
thor (~> 1.0)
zeitwerk (~> 2.5)
rake (13.0.6)
ransack (2.6.0)
activerecord (>= 6.0.4)
activesupport (>= 6.0.4)
i18n
regexp_parser (2.2.1)
reline (0.3.1)
io-console (~> 0.5)
responders (3.0.1)
actionpack (>= 5.0)
railties (>= 5.0)
rexml (3.2.5)
ruby2_keywords (0.0.5)
rubyzip (2.3.2)
scenic (1.6.0)
activerecord (>= 4.0.0)
railties (>= 4.0.0)
scenic_sqlite_adapter (0.1.0)
activerecord (>= 4.0.0)
selenium-webdriver (4.1.0)
childprocess (>= 0.5, < 5.0)
rexml (~> 3.2, >= 3.2.5)
rubyzip (>= 1.2.2)
semantic_range (3.0.0)
sprockets (4.0.3)
concurrent-ruby (~> 1.0)
rack (> 1, < 3)
sprockets-rails (3.4.2)
actionpack (>= 5.2)
activesupport (>= 5.2)
sprockets (>= 3.0.0)
sqlite3 (1.4.2)
stimulus-rails (1.0.4)
railties (>= 6.0.0)
strscan (3.0.1)
thor (1.2.1)
timeout (0.2.0)
turbo-rails (1.0.1)
actionpack (>= 6.0.0)
railties (>= 6.0.0)
tzinfo (2.0.4)
concurrent-ruby (~> 1.0)
tzinfo-data (1.2022.1)
tzinfo (>= 1.0.0)
warden (1.2.9)
rack (>= 2.0.9)
web-console (4.2.0)
actionview (>= 6.0.0)
activemodel (>= 6.0.0)
bindex (>= 0.4.0)
railties (>= 6.0.0)
webdrivers (5.0.0)
nokogiri (~> 1.6)
rubyzip (>= 1.3.0)
selenium-webdriver (~> 4.0)
webpacker (5.4.3)
activesupport (>= 5.2)
rack-proxy (>= 0.6.1)
railties (>= 5.2)
semantic_range (>= 2.3.0)
websocket-driver (0.7.5)
websocket-extensions (>= 0.1.0)
websocket-extensions (0.1.5)
xpath (3.2.0)
nokogiri (~> 1.8)
zeitwerk (2.5.4)
PLATFORMS
aarch64-linux
x86_64-linux
DEPENDENCIES
activeadmin (~> 2.11)
auto_strip_attributes (~> 2.6)
bootsnap
capybara
debug
devise (~> 4.8)
importmap-rails
puma (~> 5.0)
rails (~> 7.0.1)
scenic (~> 1.6)
scenic_sqlite_adapter (~> 0.1.0)
selenium-webdriver
sprockets-rails
sqlite3 (~> 1.4)
stimulus-rails
turbo-rails
tzinfo-data
web-console
webdrivers
webpacker (~> 5.4)
RUBY VERSION
ruby 3.0.3p157
BUNDLED WITH
2.3.5

Answer 1

I found the issue, just a dumb configuration piece on my end. I had accidentally overwrote these directories with docker-compose volumes that had been cached from a previous install.
No issue here.